Q: Even before they reached town , they could hear a sound like corn popping. Dora asked what *it* was, and Dad said it was firecrackers.
Are "sound" and "it" the same?
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A: yes


Q: Sam's drawing was hung just above Tina's and *it* did look much better with another one above it.
Are "Sam's drawing" and "it" the same?
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A: no


Q: The boy continued to whip the pony , and eventually the pony threw him over. John laughed out quite loud. "Good for *him* ," he said.
Are "pony" and "him" the same?
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A:
yes